It actually does make a difference. I had to save for every third jump to use power surge because of the 90 second recast.

With EMX's super simple rotation @ 2.4 GCD:
HP IDC TTT
HP IDF TTT

Jump is available for use after every CT. Allows jump to go off nearly immediately once its CD is done. CD reduction means every other Jump is getting modified, with no need to wait an extra 10 seconds.